Some people think it’s for a bootleg release of the Seattle Kingdome show

One theory that has been mentioned on Facebook is that the promotional graphic is for a re-release of the July 17, 1977 Seattle Kingdome show. The release date in the image would be exactly 40 years after the show. And the filename of the image posted to the Led Zeppelin forum is “07_17_17.kingdome.jpg.”

But the image doesn’t appear to come from any of the Japanese bootleg labels, making it unlikely that it’s promoting an upcoming bootleg release. We haven’t heard any rumours about a new Seattle Kingdome release, either.

Others think it’s about ‘Deus Ex Machina’

Another theory is that the graphic is designed to promote Empress Valley’s upcoming March 21, 1975 soundboard release “Deus Ex Machina.”